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		x<sub>1</sub>
		+x<sub>2</sub>
		=y<sup>2</sup>
		<hr>
		<b>加粗</b>
		<i>斜体</i>
		<u>下划线</u>
		<s>删除</s>
		<br>
		<strong>语气加重</strong>
		<em>强调</em>
		<ins>插入</ins>
		<del>删除</del>
		
		<hr >
			111
			222
			333
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			111
			222
			333
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		 _____ | _____        \     /   /______    |  |     / /_  /
		()____)+()____)     -----  /       |       | -+-.  /_.|_|/_.
		()____)+()____)      \ /  /___   __|__   | |  | |   / | | /
		()____)+()____)     ----- | |    | |     |_| _|_|_ /_\`-'/_\
		()____)+()____)     __|__ | |  __|_|____   |  |     ___|___
		()____)+()____)      /|\  | |      |       | / \     _/|\_
		     / | \
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		2023级网络工程1班&copy; &lt;2025-02-24&gt;
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